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Texas Instruments ADS8328IBRSAT
- Part No.:
- ADS8328IBRSAT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8328IBRSAT.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
ADS8328IBRSAT from Texas Instruments is a 16-bit, 500-kSPS pseudo-differential SAR analog-to-digital converter with integrated 2:1 input multiplexer, programmable TAG bit output, and SPI/DSP-compatible serial interface. It operates from 2.7 V to 5.5 V analog supply, delivers ±1 LSB max DNL and ±1.5 LSB max INL, and supports unipolar 0 V to VREF input ranges up to 4.096 V - used in high-precision transducer interface and industrial process control systems.
For engineers reviewing the ADS8328IBRSAT datasheet, ADS8328IBRSAT pinout, ADS8328IBRSAT application, or ADS8328IBRSAT equivalent, key selection considerations include its dual-channel MUX capability, auto/manual channel select mode, EOC/INT/CDI programmable status pin, daisy-chain support, and QFN-16 (4×4 mm) package with exposed thermal pad.
Technical Context
The ADS8328IBRSAT implements a capacitor-based successive approximation register (SAR) architecture with built-in sample-and-hold, internal conversion clock (10.9–12.6 MHz), and dual-input MUX enabling channel switching under software or hardware control. Its conversion logic supports both manual (CONVST-triggered) and auto-triggered acquisition modes with 3-CCLK minimum sampling time.
Digital interface compliance includes SPI Mode 0/3 and TMS320 DSP frame-sync protocols, with SDO supporting 3-state output, configurable EOC/INT polarity, and CDI-enabled daisy-chain operation. Power management features include Deep Power-Down (50 nA), Nap, and Auto-Nap modes for dynamic current scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output with no missing codes over full temperature range. |
| Sampling Rate | 500 kSPS - enables real-time capture of signals up to 250 kHz Nyquist bandwidth. |
| INL / DNL | ±1.5 LSB max / ±1 LSB max - ensures accurate representation of linear sensor outputs without calibration. |
| SNR / SFDR | 91 dB / 100 dB at 10 kHz - supports high-fidelity digitization of low-noise analog signals like magnetometer outputs. |
| Analog Supply | 2.7 V to 5.5 V - allows direct interfacing with diverse sensor front-ends and mixed-voltage systems. |
| Package | 16-pin QFN (4×4 mm, RSA) - provides compact footprint and thermal pad for stable operation in industrial ambient. |
| Operating Temp | –40°C to +85°C - qualified for deployment in harsh industrial and automotive under-hood environments. |
Pinout & Package
The ADS8328IBRSAT is housed in a 4×4 mm, 16-pin QFN package (RSA) with an exposed thermal pad internally connected to substrate - recommended to be connected to AGND or left floating, but kept separate from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VA | Analog supply input | Primary analog power rail (2.7–5.5 V); powers SAR core, reference buffer, and input MUX. |
| +VBD | Interface supply input | Digital I/O supply (1.65–5.5 V); sets logic thresholds for SDI/SDO/SCLK/FS/CS/CONVST/EOC. |
| AGND / BDGND | Analog and interface ground | Separate ground domains prevent digital noise coupling into analog path; must be connected at single point. |
| +IN0 / +IN1 | Differential noninverting inputs | Two independent analog inputs selectable via internal MUX; supports pseudo-differential measurement. |
| COM | Common inverting input | Shared reference node for both channels; typically tied to AGND or sensor common. |
| REF+ / REF− | External reference inputs | Accepts precision external reference (e.g., 2.5 V or 4.096 V); REF− must connect to AGND via dedicated via. |
| CONVST | Conversion start trigger | Edge-sensitive input that freezes sample-and-hold and initiates conversion on next internal clock edge. |
| EOC/INT/CDI | Status/data chain pin | Configurable as end-of-conversion flag, interrupt, or daisy-chain data input - enables multi-device synchronization. |
| FS/CS | Frame sync / chip select | Active-low slave select for SPI or frame sync for DSP interfaces; controls SDO enable timing. |
| SCLK | Serial clock input | Supports up to 50 MHz externally; can serve as both I/O clock and conversion clock when configured. |
| SDI / SDO | Serial data in/out | SDI accepts configuration commands (reset, channel select); SDO outputs 16-bit straight-binary result with MSB first. |
Key Features
| Feature | Design Value |
|---|---|
| 2:1 Input Multiplexer | Enables sequential sampling of two analog sources without external switching, reducing BOM and layout complexity. |
| Programmable TAG Bit Output | Appends channel identifier (CH0/CH1) to each 16-bit conversion result, simplifying firmware parsing in dual-sensor applications. |
| Multi-Chip Daisy Chain Mode | Allows cascading multiple ADS8328 devices using single SCLK/SDI/FS lines - reduces GPIO count and PCB routing layers. |
| Auto/Manual Channel Select | Hardware (CONVST edge) or software (SDI command) control over channel selection - supports flexible system-level sequencing. |
| Comprehensive Power-Down Modes | Deep Power-Down (50 nA), Nap (0.3–0.5 mA), and Auto-Nap (automatic entry/exit) enable adaptive energy management. |
Applications
| Transducer Interface | Industrial Process Control |
|---|---|
Use Scenario: Digitizing outputs from strain gauges, RTDs, or pressure sensors with millivolt-level signals and high linearity requirements. IC Role / Device Role / Timing Role: Precision ADC with integrated MUX and reference buffer; performs synchronized dual-sensor sampling at 500 kSPS. Use Value: ±1 LSB DNL and 91 dB SNR ensure <0.0015% measurement error across full scale, eliminating need for per-channel calibration. | Use Scenario: Monitoring temperature, flow, and level in PLC I/O modules operating in extended industrial temperature ranges. IC Role / Device Role / Timing Role: High-reliability ADC with –40°C to +85°C qualification, robust ESD protection, and isolated AGND/BDGND domains. Use Value: Dual-channel MUX and programmable EOC/INT simplify integration into deterministic scan-cycle architectures with minimal firmware overhead. |
| Magnetometer Systems | Medical Instrumentation |
Use Scenario: Capturing low-amplitude, high-frequency magnetic field variations in handheld compasses or current sensors. IC Role / Device Role / Timing Role: Low-jitter (10 ps aperture) SAR ADC with 30 MHz small-signal bandwidth and 100 ns overvoltage recovery. Use Value: 100 dB SFDR at 10 kHz enables clean separation of fundamental signal from harmonics and intermodulation products. | Use Scenario: Analog front-end for portable ECG or EEG monitors requiring low power, high resolution, and clinical-grade accuracy. IC Role / Device Role / Timing Role: Ultra-low-power ADC with Deep Power-Down (50 nA) and Nap mode (0.3 mA) for battery-operated devices. Use Value: 10.6 mW typical power at 2.7 V/1.8 V supplies extends runtime while maintaining 16-bit fidelity and medical-grade INL performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8327IBRSAT | Single-input (no MUX), no TAG bit, identical specs otherwise (±1 LSB DNL, 500 kSPS, QFN-16). | Used where only one analog source is required; lacks dual-channel flexibility and channel tagging. | Select when cost optimization and simplified firmware outweigh need for dual inputs. |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS, pseudo-differential, SPI interface; higher INL (±2.5 LSB max), no internal MUX or TAG bit. | Lower throughput and less integrated channel management; requires external MUX for dual inputs. | Choose if lower power (0.7 mW at 250 kSPS) and ADI ecosystem compatibility are prioritized over speed and integration. |
Compared with ADS8327IBRSAT and AD7682BCPZ-RL7, the ADS8328IBRSAT uniquely combines dual-channel MUX, programmable TAG bit, and 500-kSPS throughput in a single QFN package - delivering higher system-level integration and reduced firmware complexity for multi-sensor monitoring.
Availability
ADS8328IBRSAT is available at Aetrix Electronics and suitable for industrial process control, transducer interface, and medical instrumentation applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8328IBRSAT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS8328IBRSAT belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and robust performance in demanding industrial, medical, and test equipment applications.
FAQ
What is the maximum external SCLK frequency supported by the ADS8328IBRSAT?
The ADS8328IBRSAT supports up to 50 MHz external SCLK when used solely as an I/O clock. When SCLK also serves as the conversion clock, the maximum is 21 MHz. These limits ensure reliable setup/hold timing for SDI and valid SDO output, as verified in TI's SLAS415E timing diagrams across –40°C to +85°C.
Does the ADS8328IBRSAT require an external reference voltage?
Yes, the ADS8328IBRSAT requires an external reference applied between REF+ and REF− pins. It accepts 2.5 V or 4.096 V references with 80 kΩ input resistance; REF− must be connected to AGND via a dedicated via to minimize noise coupling and maintain specified ±1.5 LSB INL performance.
How does the programmable TAG bit function in the ADS8328IBRSAT?
The TAG bit in the ADS8328IBRSAT is appended to each 16-bit conversion result to indicate which input channel (+IN0 or +IN1) was sampled. Enabled via configuration register, it outputs '0' for CH0 and '1' for CH1 - allowing firmware to unambiguously associate data with source without additional control signaling or timestamping.
Can the ADS8328IBRSAT operate in daisy-chain mode with other ADCs?
Yes, the ADS8328IBRSAT supports daisy-chain mode using the EOC/INT/CDI pin as chain data input. In this configuration, multiple devices share SCLK, SDI, and FS/CS lines; SDO of each device connects to CDI of the next, enabling sequential readout of conversion results with minimal interface overhead.
What are the power consumption modes of the ADS8328IBRSAT and their typical currents?
The ADS8328IBRSAT offers three power modes: 500-kSPS active mode (5–6.2 mA at 5 V), Nap/Auto-Nap mode (0.3–0.5 mA), and Deep Power-Down mode (6–50 nA). These are controlled via SDI commands or hardware pins, enabling dynamic power scaling for battery-powered or thermally constrained designs.
ADS8328IBRSAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8328IBRSAT FAQ
1.How can I place an order for ADS8328IBRSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8328IBRSAT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS8328IBRSAT reliable?
The price and inventory of ADS8328IBRSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8328IBRSAT is usually 5 days.
3.What payment methods are accepted for ADS8328IBRSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8328IBRSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8328IBRSAT?
ADS8328IBRSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8328IBRSAT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS8328IBRSAT?
For technical support, including ADS8328IBRSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8328IBRSAT requirements.
6.How does Aetrix verify that ADS8328IBRSAT is sourced from the original manufacturer or authorized distributors?
All ADS8328IBRSAT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS8328IBRSAT meets industry standards.
7.What is the process for return or replacement of ADS8328IBRSAT?
All ADS8328IBRSAT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8328IBRSAT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS8328IBRSAT part is unused and in its original packaging.
Return procedure for ADS8328IBRSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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